E02: High Zone Current; E03: No Zone Current - Graco Reactor H-25 Series Repair And Parts Manual

NOTE: Before doing the following checks, note which
zone (A, B, FTS, or all) has high fluid temperature.
Table 1: Sensor Connector Continuity Checks
Pins Description
1 & 2 OT switch A
3 & 4 OT switch B
5 & 6 Thermocouple A
8 & 9 Thermocouple B
11 & 12 FTS
10 & 12 FTS
5. Verify fluid temperature, using an external
temperature sensing device.
If temperature is too high (sensor reading is 229°F
[109°C] or above):
6. Check if thermocouples A and B are damaged, or
not contacting the heater element. See
Thermocouple, page 36.
7. To test that temperature control module turns off
when equipment reaches temperature setpoint:
a. Set temperature setpoints far below displayed
temperature.
b. Turn zone on. If temperature rises steadily,
power board is failing.
c. Verify by swapping with another power module.
See Replacing Temperature Control
Assembly Modules, page 35.
d. If the swapped module does not fix the problem,
the power module is not the cause.
8. Verify continuity of heater elements with an
ohmmeter, see Primary Heaters, page 36.
312063Z
Reading
nearly 0 ohms
nearly 0 ohms
4-6 ohms
4-6 ohms
approximately 35
ohms per 50 ft (15.2
m) of hose, plus
approximately 10
ohms for FTS
open
Temperature Control Diagnostic Codes

E02: High zone current

1. Turn main power OFF
2. Relieve the pressure. See Pressure Relief
Procedure, page 26.
NOTE: Disconnect whip hose.
3. Disconnect hose connector (D) at Reactor.
4. Using an ohmmeter, check between the two
terminals of the connector (D). There should be no
continuity.
5. Exchange zone module with another one. Turn
zone on and check for error. If error disappears,
replace faulty module.
For hose zone: If error still occurs, perform
Transformer Primary Check and Transformer
Secondary Check starting on page 40.
NOTE: When there is a a high current error, the LED on
that zone's module will turn red while the error is
displayed.

E03: No zone current

1. Check for tripped circuit breaker inside electrical
cabinet or at power source for that zone. Replace
circuit breaker if it trips habitually.
2. Check for loose or broken connection at that zone.
3. Exchange zone module with another one. Turn
zone on and check for error (see page 35). If error
disappears, replace faulty module.
4. If E03 occurs for all zones, the contactor may not be
closing. Verify wiring from heater control to
contactor coil.
a. Hose zone: test hose continuity, page 38.
b. Perform Transformer Primary Check and
Transformer Secondary Check, starting on
page 40.
NOTE: When a no current error occurs, the LED on the
specific zone's module turns red when the error is
displayed.
.
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